Def Leppard guitarist Phil Collen said frontman Joe Elliott is back to normal after having vocal issues.

Elliott had walking pneumonia during their tour last year with Styx and Tesla. He continued to have a cough after recovering and doctors told Elliott he couldn’t sing for a month or he’d damage his vocal cords.

Def Leppard is going on tour with REO Speedwagon and Tesla beginning May 4th in Lafayette, Louisiana.